200 VETERINARY MATERIA MEDICA. 



without tho aid of beat. Is ready for use in about 

 ten to twelve days after preparation. 



Euphorhium, an acrid resin obtained from tbe Eu- 

 phorbia resinifera, natural order Euphorbiacese. Is a 

 very energetic irritant, vesicant, and pustulant, but 

 for horses and dogs is rather too unmanageable. An 

 alcoholic solution (six per cent.) is said to be the bet- 

 ter way of using it as a vesicant. It is, however, 

 sometimes added to blistering ointments to increase 

 their activity. 



Oleum Tiglii. See under Croton Oil. 



Emollients and Demulcents. 



Petrolatum, petroleum jelly, commonly called vas- 

 eline, cosmoline, etc. Is a jelly-like preparation, ob- 

 tained from the residuum of petroleum and afterward 

 purified. It is soluble in ether, chloroform, fixed and 

 volatile oils; insoluble in alcohol and water. It is 

 tasteless or nearly so, odorless, and of a neutral reac- 

 tion. It is non-oxidizable, and hence does not become 

 rancid, and therefore makes a most excellent basis for 

 ointments. It is used as an emollient and lubricant; 

 also as an excipient in making boluses and electuaries. 



Mel, honey. A saccharine secretion deposited in 

 the honeycomb by Apis mellifica, the honey-bee, an 

 insect of the order Hymenoptera. 



Mel Despumatum, clarified honey, is honey 

 warmed, skimmed, and strained, with five per cent, 

 of glj^cerin added. 



Oxymel consists of honey 40, acetic acid 5, and 

 water 5 parts. 



